Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

3G Electric
RFQ CartGet a QuoteSign inSign up
RANCO Dual Pressure Control: SPST, 10 in Hg to 100 psi Low Side, 150 psi to 450 psi High Side - Dual Pressure Controls
RANCODual Pressure Controls

RANCO Dual Pressure Control: SPST, 10 in Hg to 100 psi Low Side, 150 psi to 450 psi High Side

The RANCO O Series Dual Pressure Control (MPN O12-1549) is a SPST dual pressure control. It features a low-side range of 10 in Hg to 100 psi and a high-side range of 150 psi to 450 psi, housed in a NEMA 1 enclosure.

SKU 3G-OTH-66772

Also listed as: O121549 · O12 1549

Brand
RANCO
Item
Dual Pressure Control: SPST, 10 in Hg to 100 psi Low Side, 150 psi to 450 psi High Side
Category
Dual Pressure Controls
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

RANCO
Manufacturer Part Number
O12-1549
Series
O Series
Type
10 in Hg to 100 psi Low Side, NEMA 1
High Side
150 psi to 450 psi
Product Type
Dual Pressure Control

Technical Documents

No technical documents available for this product.
Request documentation →
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

RANCO Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The RANCO O Series Dual Pressure Control (MPN O12-1549) is a SPST dual pressure control. It features a low-side range of 10 in Hg to 100 psi and a high-side range of 150 psi to 450 psi, housed in a NEMA 1 enclosure.

Frequently Asked Questions

What is the RANCO O12-1549 dual pressure control used for?

The RANCO O12-1549 dual pressure control is used in commercial refrigeration and HVAC systems to monitor and protect compressors by switching on low-side pressure (10 in Hg to 100 psi) and high-side pressure (150 psi to 450 psi). It helps prevent system damage from pressure extremes.

What are the specifications of the RANCO O12-1549 dual pressure control?

The RANCO O Series O12-1549 is a SPST dual pressure control with a low-side range of 10 in Hg to 100 psi and a high-side range of 150 psi to 450 psi. It comes in a NEMA 1 enclosure. The manufacturer part number is O12-1549.

Where to buy the RANCO O12-1549 dual pressure control worldwide?

You can source the RANCO O12-1549 dual pressure control through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time.

How to install the RANCO O12-1549 dual pressure control?

Install the RANCO O12-1549 by mounting it in a dry location (NEMA 1 rated) and connecting the low-side and high-side pressure lines per the wiring diagram. Ensure proper electrical connections for the SPST switch. Always follow manufacturer guidelines and local codes.

Used in

Common applications for RANCO
Commercial refrigeration — RANCO A12-1506 constant differential defrost control for walk-in freezer defrost cycles
HVAC system protection — RANCO RHS-250150 high-limit pressure switch for overpressure safety in chillers
Industrial cooling — RANCO O12-1506 dual pressure control for monitoring suction and discharge pressures in refrigeration racks
Food storage — RANCO O10-1408 temperature control for maintaining -15°F to 40°F in cold storage rooms
Compressor protection — RANCO P30-3701 mechanical lube oil pressure control for Danfoss compressors in supermarket refrigeration
Refrigerant filtration — RANCO RBFD-163 liquid line filter drier for moisture removal in HCFC systems up to 50 tons

RANCO Products

3G Electric supplies RANCO dual pressure controls. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

You might also need

Burners & Combustion →Pumps & Compressors →Spare Parts →All Products →

Compatible alternatives & equivalents

Cross-referenced by specification & description
Steel screw-in, screw adjustment, two-way pressure control cartridge valve with C10-2 cavity size and polyurethane seal. Used to limit system pressure in hydraulic circuits, providing overpressure protection in industrial machinery, mobile equipment, and fluid power systems
Parker
Steel screw-in, screw adjustment, two-way pressure control cartridge valve with C10-2 cavity size and polyurethane seal. Used to limit system pressure in hydraulic circuits, providing overpressure protection in industrial machinery, mobile equipment, and fluid power systems
Two-way pressure-actuated water regulating valve with a brass body. Opening pressure range 0 psi to 20 psi. Connection size 3/8 in female sweat. For use with R-404A refrigerant. Used in refrigeration systems to modulate condenser water flow based on refrigerant pressure
Parker
Two-way pressure-actuated water regulating valve with a brass body. Opening pressure range 0 psi to 20 psi. Connection size 3/8 in female sweat. For use with R-404A refrigerant. Used in refrigeration systems to modulate condenser water flow based on refrigerant pressure
PARKER Pressure Relief Valve: Steel, Screw-In, Screw Adjustment, Two-Way, C10-2 Valve Cavity Size (MPN RDH103S30)
Parker
PARKER Pressure Relief Valve: Steel, Screw-In, Screw Adjustment, Two-Way, C10-2 Valve Cavity Size (MPN RDH103S30)
This Parker pressure-actuated water regulating valve features a three-way configuration with a brass body and 3/8 in female sweat connections. It has an opening pressure range of 0 psi to 60 psi and is designed for use with R-404A refrigerant. Typical applications include modulating condenser water flow in refrigeration systems to maintain proper head pressure
Parker
This Parker pressure-actuated water regulating valve features a three-way configuration with a brass body and 3/8 in female sweat connections. It has an opening pressure range of 0 psi to 60 psi and is designed for use with R-404A refrigerant. Typical applications include modulating condenser water flow in refrigeration systems to maintain proper head pressure
Brass check valve with 2 in NPT male and 2 in (F)NPT female connections. Rated for maximum pressure of 250 psi. Used in pneumatic systems to prevent backflow and ensure unidirectional flow of compressed air
CONTROL DEVICES
Brass check valve with 2 in NPT male and 2 in (F)NPT female connections. Rated for maximum pressure of 250 psi. Used in pneumatic systems to prevent backflow and ensure unidirectional flow of compressed air
Brass check valve with 1 in NPT male and 1 in (F)NPT female connections. Rated for maximum pressure of 250 psi. Used in pneumatic systems to allow air flow in one direction and prevent backflow
CONTROL DEVICES
Brass check valve with 1 in NPT male and 1 in (F)NPT female connections. Rated for maximum pressure of 250 psi. Used in pneumatic systems to allow air flow in one direction and prevent backflow

More from RANCO

View all RANCO parts →
The RANCO O12-1550 is a Series O dual pressure control with a single-pole single-throw (SPST) switch. It monitors low-side pressure from 10 in Hg to 100 psi and high-side pressure from 150 psi to 450 psi, with a low-side differential of 11 psi to 40 psi. Operating at 120/240V AC, it is used in refrigeration, HVAC, and process systems to protect compressors by switching on pressure conditions
RANCO
The RANCO O12-1550 is a Series O dual pressure control with a single-pole single-throw (SPST) switch. It monitors low-side pressure from 10 in Hg to 100 psi and high-side pressure from 150 psi to 450 psi, with a low-side differential of 11 psi to 40 psi. Operating at 120/240V AC, it is used in refrigeration, HVAC, and process systems to protect compressors by switching on pressure conditions
Dual pressure control with SPST switching, low-side range 12 in Hg to 50 psi, high-side range 150 psi to 450 psi, NEMA 1 enclosure. Used in refrigeration and HVAC systems to monitor and switch on low and high pressure circuits, protecting compressors from unsafe conditions
RANCO
Dual pressure control with SPST switching, low-side range 12 in Hg to 50 psi, high-side range 150 psi to 450 psi, NEMA 1 enclosure. Used in refrigeration and HVAC systems to monitor and switch on low and high pressure circuits, protecting compressors from unsafe conditions
Dual pressure control with SPST switch, low-side range 12 in Hg to 50 psi, high-side range 100 psi to 250 psi, in a NEMA 1 enclosure. Used in commercial refrigeration and HVAC systems to monitor compressor pressure and protect against fault conditions
RANCO
Dual pressure control with SPST switch, low-side range 12 in Hg to 50 psi, high-side range 100 psi to 250 psi, in a NEMA 1 enclosure. Used in commercial refrigeration and HVAC systems to monitor compressor pressure and protect against fault conditions
The RANCO Series O dual pressure control is a single-pole single-throw switch designed for pressure monitoring in refrigeration and HVAC systems. It features a low-side range of 10 in Hg to 100 psi and a high-side range of 150 psi to 450 psi, with a voltage rating of 120/240V AC. This control protects compressors by cutting out on high pressure and cutting in on low pressure
RANCO
The RANCO Series O dual pressure control is a single-pole single-throw switch designed for pressure monitoring in refrigeration and HVAC systems. It features a low-side range of 10 in Hg to 100 psi and a high-side range of 150 psi to 450 psi, with a voltage rating of 120/240V AC. This control protects compressors by cutting out on high pressure and cutting in on low pressure
Dual pressure control with SPST switching for monitoring and protecting compressors in commercial refrigeration and HVAC systems. Low-side range: 12 in Hg to 50 psi; high-side range: 150 psi to 450 psi. Housed in a NEMA 1 enclosure
RANCO
Dual pressure control with SPST switching for monitoring and protecting compressors in commercial refrigeration and HVAC systems. Low-side range: 12 in Hg to 50 psi; high-side range: 150 psi to 450 psi. Housed in a NEMA 1 enclosure
Dual Pressure Control: SPST, 10 in Hg to 100 psi Low Side, 150 psi to 450 psi High Side, NEMA 1 (MPN O12-4834)
RANCO
Dual Pressure Control: SPST, 10 in Hg to 100 psi Low Side, 150 psi to 450 psi High Side, NEMA 1 (MPN O12-4834)
Dual Pressure Control: SPST, 10 in Hg to 100 psi Low Side, 150 psi to 450 psi High Side, NEMA 1 (MPN o12-1594)
RANCO
Dual Pressure Control: SPST, 10 in Hg to 100 psi Low Side, 150 psi to 450 psi High Side, NEMA 1 (MPN o12-1594)